<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar
      class="page-nav-bar"
      title="登录"
    />

    <!-- 登录表单 -->
    <van-form
      @submit="onSubmit"
      ref="loginForm"
    >
      <van-field
        name="mobile"
        v-model="user.mobile"
        placeholder="请输入手机号"
        :rules="userFormRules.mobile"
        type="number"
        maxlength="11"
      >
        <i
          slot="left-icon"
          class="iconfont icon-shouji"
        ></i>
      </van-field>
      <van-field
        name="code"
        v-model="user.code"
        placeholder="请输入验证码"
        :rules="userFormRules.code"
        type="number"
        maxlength="6"
      >
        <i
          slot="left-icon"
          class="iconfont icon-yanzhengma"
        ></i>
        <template #button>
          <!-- 倒计时 -->
          <van-count-down
            v-if="isCountDownShow"
            :time="1000 * 5"
            format="ss s"
            @finish="isCountDownShow = false"
          />
          <!-- 发送验证码按钮 -->
          <van-button
            v-else
            native-type="button"
            size="small"
            type="primary"
            @click="onSendSms"
          >发送验证码</van-button>
        </template>
      </van-field>
      <div style="margin: 16px;">
        <van-button
          block
          type="info"
          native-type="submit"
        >提交</van-button>
      </div>
    </van-form>
  </div>
</template>

<script>
import { login, sendSms } from "@/api/user";
export default {
  name: "Login",
  data() {
    return {
      isCountDownShow: false, // 控制倒计时的显示和隐藏
      // 用户登录数据对象
      user: {
        mobile: "13911111111",
        code: "246810",
      },
      // 用户名和验证码校验规则
      userFormRules: {
        mobile: [
          {
            required: true,
            message: "手机号不能为空",
          },
          {
            pattern: /^1[3|5|7|8]\d{9}$/,
            message: "手机号格式错误",
          },
        ],
        code: [
          {
            required: true,
            message: "验证码不能为空",
          },
          {
            pattern: /^\d{6}$/,
            message: "验证码格式错误",
          },
        ],
      },
    };
  },
  methods: {
    // 验证手机验证码
    async onSendSms() {
      // 1. 校验手机号
      try {
        await this.$refs.loginForm.validate("mobile");
      } catch (err) {
        return console.log(err);
      }

      // 2. 验证通过，显示倒计时
      this.isCountDownShow = true;
      // 3. 请求发送验证码
      try {
        // 发送验证码用来干嘛的？？
        const res = await sendSms(this.user.mobile);
        // console.log(res);
        this.$toast("发送成功");
      } catch (error) {
        // 发送失败，关闭倒计时
        this.isCountDownShow = false;
        if (error.response.status === 429) {
          this.$toast("发送太频繁了，请稍微重试");
        } else {
          this.$toast("发送失败，请稍后重试");
        }
      }
    },
    // 表单提交事件
    async onSubmit(values) {
      console.log("submit", values);
      // console.log(login);
      // 2. 表单验证
      this.$toast.loading({
        message: "登录中...",
        forbidClick: true, // 禁用背景点击
        duration: 0, // 持续时间，默认是 2000，如果为 0 则持续展示
      });
      try {
        const { data } = await login(this.user);
        // console.log(data);
        this.$toast.success("登录成功");
        // 触发 commit 更新 state 状态
        this.$store.commit("setUser", data.data);
      } catch (error) {
        if (error.response.status === 400) {
          // console.log("手机号或验证码错误");
          this.$toast.fail("手机号或验证码错误");
        } else {
          // console.log("登录失败，请稍后重试", error);
          this.$toast.fail("登录失败，请稍后重试");
        }
      }
    },
  },
};
</script>

<style lang="less" scoped>
.login-container {
  .toutiao {
    font-size: 37px;
  }
  .send-sms-btn {
    width: 152px;
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }
  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}

/deep/ .van-button--primary {
  border-color: #1989fa !important;
}
</style>